Solved Assignments Jul-Jan 2014-15

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Course Code : MCSL-017

Course Title : C and Assembly Language Programming

Assignment Number : MCA(1)/L017/Assign/2014-15

Maximum Marks : 100

Weightage : 25%

Last Dates for Submission : 15th October, 2014 (For July 2014 Session)

15th April, 2015 (For January 2015 Session)

This assignment has two sections. Answer all questions in each section. Each Section is of 20

marks. Your Lab Records will carry 40 Marks. Rest 20 marks are for viva voce. You may use

illustrations and diagrams to enhance the explanations. Please go through the guidelines

regarding assignments given in the programme guide for the format of presentation.

Section 1: C Programming Lab

Question 1:Write an interactive program in C language to create an application similar to NOTEPAD.Write a

program, mynotepad.c, which reads words from any file having extension .txtand displays each

word on a line by itself. A word is defined as any sequence of characters separated by a blank, a tab,

or a newline. Note that this definition for a word considers punctuation as part of the word. This

program should have features like cut, copy, paste, write and search. The application should be

designed user-friendly.

Note: You must execute the program and submit the program logic, sample input and output along

with the necessary documentation for this question.Assumptions can be made wherever necessary.

Solution : Coming Soon

Section 2: Assembly Language Programming Lab

Question 1:

a) Write a program in assembly language for converting lower case to upper case in a given

string of characters.

Solution :

DATA SEGMENT

MSG1 DB 10,13,ENTER ANY STRING :- $

MSG2 DB 10,13,CONVERTED STRING IS : $

P1 LABEL BYTE

M1 DB 0FFH
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DISPLAY P11

MOV AH,4CH

INT 21H

CODE ENDS

END START

b) Develop and execute an assembly language program to read an array of numbers and

find the minimal and maximal elements.

Solution:

DATA SEGMENT

ARR DB 5,3,7,1,9,2,6,8,4

LEN DW $-ARR

MIN DB ?

MAX DB ?

DATA ENDS

CODE SEGMENTASSUME DS:DATA CS:CODE

START:

MOV AX,DATA

MOV DS,AX
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LEA SI,ARR

MOV AL,ARR[SI]

MOV MIN,AL

MOV MAX,AL

MOV CX,LEN

REPEAT:

MOV AL,ARR[SI]

CMP MIN,AL

JL CHECKMAX

MOV MIN,AL

CHECKMAX:

CMP MAX,AL

JG DONE

MOV MAX,AL

DONE:

INC SI

LOOP REPEAT

MOV AH,4CH

INT 21H

CODE ENDS

END START

Before Execution :-


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After Execution :-
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c) Write a program in assembly language to print out the length of string.

Solution:

DATA SEGMENTSTR DB GANGADHAR$

MSG1 DB 10,13,THE STRING IN THE MEMORY IS : $

MSG2 DB 10,13,LENGTH OF THE STRING IS :- $

LEN DB 0H

DATA ENDS
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DISPLAY MACRO MSG

MOV AH,9

LEA DX,MSG

INT 21H

ENDM

CODE SEGMENT

ASSUME CS:CODE,DS:DATA

START:

MOV AX,DATA

MOV DS,AX

DISPLAY MSG1

DISPLAY STR

LEA SI,STR

NEXT:

CMP [SI],$

JE DONE

INC LEN

INC SI

JMP NEXT

DONE:

DISPLAY MSG2

MOV AL,LEN

ADD AL,30H

MOV DL,AL

MOV AH,2

INT 21H


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MOV AH,4CH

INT 21H

CODE ENDS

END START

After Execution :-

d) Write a program in assembly language to print an infinite sequence of pseudo-random

numbers.

Solution:

DATA SEGMENT

MSG1 DB 10,13,RANDOM NUMBERS ARE : $

MSG2 DB 10,13, $
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RES DB 10 DUP ($)

DATA ENDS

CODE SEGMENT

ASSUME DS:DATA CS:CODE

START:

MOV AX,DATA

MOV DS,AX

LEA DX,MSG1

MOV AH,9INT 21H

LEA DX,MSG2

MOV AH,9

INT 21H

NXT:

MOV AH,2CH ; Set time functionINT 21H

MOV AX,DX ; DH=seconds,DL=hundredths of second

XOR AH,AH

LEA SI,RES

CALL HEX2DEC

LEA DX,RES

MOV AH,9

INT 21H


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LEA DX,MSG2

MOV AH,9

INT 21H

JMP NXT

MOV AH,4CH

INT 21H

CODE ENDS

HEX2DEC PROC NEAR

MOV CX,0

MOV BX,10

LOOP1: MOV DX,0

DIV BX

ADD DL,30H

PUSH DX

INC CX

CMP AX,9

JG LOOP1

ADD AL,30H

MOV [SI],AL

LOOP2: POP AX

INC SI

MOV [SI],AL

LOOP LOOP2

RET

HEX2DEC ENDP

END START


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After Execution :-

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Solved Assignments Jul-Jan 2014-15